Recent content by miamirulz29

Homework Statement A giant yo-yo of mass 400 kg measuring about 1.2 m in radius was dropped from a platform 63 m high. One end of the string was tied to the platform, so the yo-yo unwinds as it descended. Assuming that the axle of the yo-yo has a radius of .1 m, find the velocity of descent at...

Homework Statement Two objects are connected by a light string passing over a light frictionless pulley as shown in the figure. the 5.87 kg object is released from rest at a point 2.55m above the floor. The acceleration of gravity is 9.8 m/s^2. What is the speed of each object at the instant...

Sorry, this a non-calculus based physics course and I do not know calculus yet. However, I have figured out the answers. For 10: it is kQ/a and For 11: it is the one with three terms. I don't understand how the answer those two answers work. Could you explain them to me please? Thanks in advance.

Homework Statement Consider a solid conducting sphere with an inner radius R1 surrounded by a concentric thick conducting spherical shell which has an inner radius R2 and outer radius R3. There is a charge Q on the sphere and no net charge on the shell. For all parts of this problem, we adopt...

I just found it that there was a typo in the problem. The teacher meant to say joules not volts.

You still haven't answered the question. How can electric potential energy be in volts, if electric potential is in volts?

I understand what you are saying, t = d/v. But I am looking for potential energy not electric potential.

Exactly. charge, q, is in coulomb. Electric potential is in volts. coulomb * volts = joules. So you LOOK at the equation!

But doesn't that equation give the energy in joules?

In my teacher gave us homework on electricity. One of the questions ask "what is the potential energy of the pair of charges? Answer in the units of V." Is that an error, or is there a way to convert Joules to Volts?

Anybody? Just tell me if what I am doing is correct.

Homework Statement Water flows through a .259m radius pipe at the rate of .125m^3/s. The pressure in the pipe is atmospheric. The pipe slants downhill and feeds into a second pipe with a radius of .190m, positioned .796m lower. What is the gauge pressure in the lower pipe? The acceleration of...

Homework Statement 1 mole of an ideal gas is at 7 atm pressure, occupies 6L and has an internal energy of 508 J. the gas is first cooled at constant volume until its pressure is 1 atm. It is then allowed to expand at constant pressure until its volume is 8L with an internal energy of 814 J...

So would you set up a proportion? 327/389=0/x But you can't do that because x would be zero.

How do I know what the velocity of the sound in the air is?